Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6661898 | Speaker for an electronic instrument | — | 2003-12-09 |
| 6504940 | Connecting device for connecting a sound producing device to an electronic equipment | Hajime Omata, Shunichi Watanabe, Yoshizumi Ohta | 2003-01-07 |